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BfE. LOVELL. 'RING HARDBNING MACHINE.

Patented Apr. 13, 1897.

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B. E. LOVELL.

` VRING HARDENING MACHINE. No. 580,580. Patented Apr. 13, 1897.

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BOYDEN E. LOVELL, OF PROVIDENCE, RHODE ISLAND.

RING-HARDENlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 580,580, dated April 13, 189'?.

Application filed August 20, 1896. Serial No. 603,316. (No model.)

Tottl whom it may cora/cera: Y

Be it known that I, BOYDEN E. LOVELL, of Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Ring-IIardening Machines; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this speciiication.

This invention has reference to improvements in machines for hardening rings, and relates particularly to a machine for hardening the rings by the impact of a die thereon.

The object of the invention is to provide a simple and durable machine wherein rings may be supported and subjected to a series of sudden blows.

The invention consists in the mechanism for supporting the rings and the combination therewith of the novel impact device.

The invention also consists in the impact device together with the means for operating the same.`

The invention also consists in such other novel features of construction and combination of parts as will hereinafter be more fully described, and pointed out in the claims.

Figure l represents a front elevation of the improved ring-hardening machine. Fig. 2 represents a plan view of the same, partially in section, along the hammer-arm. Fig. 3 represents a partial vertical section taken on a line a a, Fig. 2. Fig. 4 represents a rear view of the plunger-guide, showing the connection therewith of the liftenarm and the iieXible connections for operating this arm. Fig. 5 represents a cross-sectional view taken on the line h Z9, Fig. 1, to more clearly show the conn nection with the belt-shipper. Figs. 6 and 7 represent, respectively, end and front views of the ring-mandrel and striking-die.

Similar numbers and letters of reference designate corresponding parts throughout.

In the art of ring manufacture, and particularly in that of the manufacture of plated rings and those formed of the lower grades of metal, the wearin g qualities of the rings are greatlyT improved by hardening the same. Owing to the low price of these rings it is essential that the hardening process be simple and rapid. I'leretofore this step has been sought to be accomplished in the burnishing process, but with partial success, as the temperatureof the metal in the ring has not been sufficiently and suddenly raised to effect the degree of crystallization of the metal.

In carrying my invention into practice I construct a substantial table or supportingbed 10, usually mounted on legs, as 11 11, between which is journaled the rock-shaft 12, carrying the foot-plates or pedals 13 and 14. On the table 10 are mounted the brackets 15 and 16, in the upperportion of which is journaled the drive-shaft 17., carrying the loose pulley 18, the tight pulley 19, and the operating-wheel 20, having the radial fingers 21 21. This shaft 17 has also a hand-crank 22 for turning the same by hand.

Through the lower portions of the brackets 15 and 16 are formed bearings in which the shipper operating-rod 23 is reciprocal. At one end of this rod is the stirrup 24 and at the opposite end the belt-shipper 25, by means of which the belt may be shipped from one pulley to the other. In order that the belt may be normally on the loose pulley 18, I mount the coiled spring 26 on the rod 23, the expansion of the spring being limited by the inner surface of the bracket 16 and the face of the collar 27, which is secured on the rod 23, and has a slotted shank 23 reciprocal on the bolt 29, which is secured in the edge of the bracket 16. Immediately below the stirrup 24E I pivotally mount the bell-crank lever 30, the vertical arm of which is engaged in the stirrup 24, while the horizontal arm is connected by the connection 31 with the pedal 14, so that the throwing down of this pedal will, through the connections therewith, operate the beitshipper to move the drive-belt onto the fixed pulley to drive the shaft 17, while the release of the pedal will permit the action of the spring 26 to reverse this movement.

On the table-top 10 is also mounted the fitting 32, carrying the vertical post 33, havinga socket in its upper end. In this socket is secured the reduced portion 34 of the member 35, having a transverse slot 36 and an upper end 37. In the slot 36 is pivotally mounted the hammerarm 38, having at one end the hammer 39, which may be furnished with a cushion-piece 40, and at the other end is provided with the intercepting tongue-block 41,

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adjust-ably secured to the hammer-arm and adapted to be engaged by the fingers 21 o f the wheel 20 to cause the lifting of the hammer. To the depressible end of the arm 38 is secured one end of the spring 42, the opposite end of which is secured to the take-up screw 43, mounted in the end 37 of the post member 35.

To the table 10 and adjacent to the fitting 32 is adj ustably secured the block 44, in which a mandrel 45, of any suitable size and crosssectional shape, may be secured in a horizontal position. To this block 44 is adj ustably secured the plunger-bracket 46, having the vertical guide 47, in which the plunger 48 is free to move, its rotation being prevented by the pin 49, secured in the plunger and working in the slot 50 of the plunger guide or case 47. The lower end of the plunger 48 is furnished with means .for holdinga die, as 51, havinga concavity in its lower surface shaped to correspond to a portion of the surface of the ring to be acted upon. On the upper end of the plunger case or guide 47 is mounted the coiled spring 52, which embraces the plunger and, bearing against the upper enlarged portion thereof, tends to lift the plunger when it is relieved from the weight of the hammer.

The lifting arm or lever 53 is pivoted to an extension 54 on the plunger-case and extends rearwardly, having a slot 55, working on the pin 49, secured in the plunger. To the tabletop and in the rear of `the block 44 is secured the bracket 56, carrying the sheave 57. Over this sheave works the flexible connection 58,

secured at one end to the treadle 13 and at the otherto the free endof the lifting-arm 53. To this end of the arm is also connected the cable 59, carrying the weight 60.

In operating .the machine the treadle 13 is first depressed, thus lifting the rear end of the arm 53 and with it the plunger 50. The ringR is-now placed on the mandrel 45,and the treadle 13 is released, thus allowing the plunger to assume its normal position. The' treadle 14 being now depressed the belt-shipper 25, through its connections with the treadle, is operated'to move the belt onto the fixed pulley 19 to drive the shaft 17 and the wheel 2O on this shaft.

As the wheel 2O is rotated its fingers 21 strike the tongue 41 on the hammer-arm and depress this end of the arm until it assumes a position where the finger 21 may pass the tongue 41. On the release of the tongue 41 from the finger of the wheel 2O the spring 42 acts to draw this end of the hammer-arm 38 upward until the hammer 39 strikes a sudden blow on the plunger 48, which is driven downward thereby until the die 51 strikes the ring R, the rapid blows thus struck on the ring tending to suddenly raise the temperature of the same, resulting in the hardening of the ring. During the operation the ring is rotated about the mandrel, so that all portions may be subjected to the impact of the die.

Having thus described my invention, I

claim as new and desire to secure' by Letters Patent- 1. In a ring-hardening machine, the combination with a table, a mandrel-block mounted thereon, a mandrel removably secured in the block, a plunger-case adjustably secured to the block, and a spring -lifted plunger working in said case and furnished with a pin, of a lever-arm pivoted to the plungercase and having a slot in which the plungerpin engages, a weight suspended from the free end of the lever, a sheave mounted above this end, a treadle, and a connection passing over said sheave from the lever to the treadle.

2. In a ring-hardening machine, the combination with a table, a mandrel-block mounted thereon, a mandrel carried by the block, a plunger-chamber adjustable on the block, and a spring-lifted plunger movable in said case, of a hammer-post mounted adjacent to the mandrel-block, a hammer-arm pivoted in the post, a head on said arm acting on the plunger, a tongue adjustable on the opposite end of the arm, a spring secured to this end.

of the arm and to the upper portion of the ham mer-post, and means for rapidly depressing the tongue end of the hammer-arm against the action of the spring.

The combination with the table 10 having supports, the shaft 12 journaled in bearings thereon, the treadles 13 and 14 on this shaft, the brackets 15 and 16 on the table, the shaft 17 journaled in the brackets, the Ypulleys 18 and 19, and the wheel 2O having fingers 21 on the shaft, the belt-shipper rod 23 reciprocal in the brackets 15 and 16, the spring 26 on said rod, the collar 27 mountedon the rod and having the sliding arm 28 movable on the pin 29, and the means for operating this rod 23 from the treadle 14, of the block 44, the mandrel 45 therein, the bracket 46 carrying the plunger-case 47 adjustable on the block, the plunger 48 adapted vto carry a die at its lower end mounted to move in the case, the pin 49 secured in the plunger and extending through a slot in the plunger-case, the arm 53 pivoted to the plunger-case and having a slot 55 engaging the pin 49, means connecting the free end of the arm 53 with the treadle 13 for lifting said arm, the spring 52 carried by the plunger-case for exerting a lifting action on the plunger, the hammerpost mounted on the table between the wheel 20 and the block 44, the jarm 38 pivoted in the post, the ham mer-head 38 at the plunger end of said arm, the tongue-piece 41 adjustably secured to the .opposite end of .the yarm, and the spring 42 secured to the tongued end of the hammer-armand to the yupper end of the hammer-post, :as described.

In witness whereof I have hereunto set my hand.

BOYDEN E. L'OVELL.

Witnesses:

.Tosnrn A. MILLER, Jr., B. M. SIMMs.

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